Method for receiving physical control channel in wireless communication system, and device using same

Abstract

A base station in a wireless communication system is provided. Each base station for wireless communication comprises: a communication module; and a processor. The processor is configured to determine the number of dynamic slot format information (SFI) bits based on a maximum value of a slot format combination index which can be indicated by dynamic SFI transmitted to a terminal, and monitor a physical downlink control channel (PDCCH) including the dynamic SFI based on the number of the dynamic SFI bits. The slot format combination index identifies a slot format combination configured for the terminal. The slot format combination indicates a type of a symbol included in one or more slots, and the type of the symbol is one among a downlink symbol, an uplink symbol, and a flexible symbol.

The invention claimed is: 
     
       1. A user equipment for a wireless communication system, the user equipment comprising:
 a processor configured to: monitor a physical downlink control channel (PDCCH) including a downlink control information (DCI) and determine a number of dynamic slot format information (SFI) bits included in the DCI based on a maximum value of slot format combination indexes capable of being indicated by dynamic SFI received by the user equipment, wherein each of the slot format combination indexes identifies a slot format combination configured for the user equipment, the slot format combination indicates types of symbols included in one or more slots, and each of the types of symbols is any one of a downlink symbol, an uplink symbol, and a flexible symbol, 
 wherein when the maximum value of the slot format combination indexes is 0, the user equipment determines that the number of the dynamic SFI bits is 1. 
 
     
     
       2. The user equipment of  claim 1 , wherein the processor is configured to determine the number of the dynamic SFI bits according to max(ceil(log 2 (maxSFIindex+1)), 1),
 wherein max(a, b) represents a greater value of “a” and “b”, and 
 wherein maxSFIindex represents the maximum value of the slot format combination indexes. 
 
     
     
       3. The user equipment of  claim 2 , wherein when the user equipment receives the dynamic SFI, the processor is configured to determine a slot format combination configured for the user equipment based on a value of the dynamic SFI and perform transmission or reception based on the determined slot format combination. 
     
     
       4. The user equipment of  claim 1 , wherein when the user equipment receives the dynamic SFI, the processor is configured to determine a slot format combination configured for the user equipment based on a value of the dynamic SFI and perform transmission or reception based on the determined slot format combination. 
     
     
       5. The user equipment of  claim 4 , wherein the processor is configured to cancel transmission and reception of semi-static radio resource control (RRC)-configured measurement signals when the maximum value of the slot format combination indexes is 0 and the value of the dynamic SFI received by the user equipment is 1. 
     
     
       6. The user equipment of  claim 4 , wherein when the maximum value of the slot format combination indexes is 0, the processor is configured not to expect the value of the dynamic SFI to be 1. 
     
     
       7. The user equipment of  claim 1 , wherein the processor is configured to perform operations corresponding to a case where a PDCCH including the dynamic SFI is not received when the maximum value of the slot format combination indexes is 0 and a value of the dynamic SFI received by the user equipment is 1. 
     
     
       8. A method of operating a user equipment for a wireless communication system, the method comprising:
 monitoring a physical downlink control channel (PDCCH) including a downlink control information (DCI); and 
 determining a number of dynamic slot format information (SFI) bits based on a maximum value of slot format combination indexes capable of being indicated by dynamic SFI received by the user equipment, wherein each of the slot format combination indexes identifies a slot format combination configured for the user equipment, wherein the slot format combination indicates types of symbols included in one or more slots, and wherein each of the types of symbols is any one of a downlink symbol, an uplink symbol, and a flexible symbol, 
 wherein the determining the number of the dynamic SFI bits comprises when the maximum value of the slot format combination indexes is 0, determining that the number of the dynamic SFI bits is 1. 
 
     
     
       9. The method of  claim 8 , wherein the determining the number of dynamic SFI bits comprises determining the number of dynamic SFI bits according to max(ceil(log 2 (maxSFIindex+1)), 1), wherein max(a, b) represents a greater value of “a” and “b”, and
 wherein maxSFIindex represents the maximum value of the slot format combination indexes. 
 
     
     
       10. The method of  claim 9 , further comprising when the user equipment receives the dynamic SFI, determining a slot format combination configured for the user equipment based on a value of the dynamic SFI and performing transmission or reception based on the determined slot format combination. 
     
     
       11. The method of  claim 8 , further comprising when the user equipment receives the dynamic SFI, determining a slot format combination configured for the user equipment based on a value of the dynamic SFI and performing transmission or reception based on the determined slot format combination. 
     
     
       12. The method of  claim 11 , further comprising, when the maximum value of the slot format combination indexes is 0 and the value of the dynamic SFI is 1, cancelling transmission and reception of semi-static radio resource control (RRC)-configured measurement signals. 
     
     
       13. The method of  claim 11 , further comprising, when the maximum value of the slot format combination indexes is 0, not expecting the value of the dynamic SFI to be 1. 
     
     
       14. The method of  claim 8 , further comprising, when the maximum value of the slot format combination indexes is 0 and a value of the dynamic SFI is 1, performing operations corresponding to a case where a PDCCH including the dynamic SFI is not received.